Aparallelogram has an interior angle measuring 81°. which must also be the measure of an interior angle of the parallelogram?
a) 9°
b) 19°
c) 49°
d) 89°
e) 99°

Find the value of the cosine for angle a

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.